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(No Model.) 2 Sheets-Sheet 1.

F. W. WIESEBRO-OK. FEEDING FUEL T0 FIRE.

' No. 439,738. Pate'nted'Nov. 4, 1890.

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(No ModeL) 2 Sheets -Sheet 2. F. W. WIES'EBR'OOK.

FEEDING FUEL T0 FIRE.

No. 439,738. Patented Nov. 4, 1890.

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fillllnllllllml l UNITED STATES PATENT OFFICE.

FREDERICK W. WIESEBROOK, OF NEW YORK, N. Y.

FEEDING FUEL TO FIRE.

SPECIFICATION forming part of Letters Patent No. 439,738, dated November 4, 1890.

Application filed January 14, 1890. Serial No. 336,916. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK W. WIESE- BROOK, of New York, N. Y., have invented certain new and useful Improvements in Feeding Fuel to Fires, of which the following is a specification.

The ordinary method of supplying fuel to fires is by throwing the same on top of the burning fuel on .the grate. By this mode of firing the fresh supply of fuel partially smothers the fire on which it is thrown and reduces the temperature. This interferes with the ignition and combustion of the gases and carbon driven from the fresh fuel by the heat of the fire, and thus causes imperfect combustion, smoke, and consequent waste of fuel.

It is an object of myinvention to avoid the above objections. To this end the invention consists in feeding in the fuel from the under side of the fire.

In the accompanying drawings I have represented the best means as yet devised by me for carrying out my invention.

Figure 1 is a cross-section of a boiler-furnace embodying my invention. Fig. 2 is a longitudinal section of the same. Fig. 3 is an elevation, partly in section, showing the invention applied to a heating-stove.

1 is the fire-pot; 2, the bridge-wall; 3, the fuel on the grate; 4, the grate.

5 is a'feeding-spout, through which the fuelsupply is forced by an endless screw conveyer 6 in the feed-channel 9.

7 is ahopper, into which the fuel is thrown and from which it is fed by screw 6.

10 is a worm-Wheel, and 11 a Worm for rotating the screw. The worm may be driven by a suitable engine acting through abelt on belt-wheel 12 on the worm-shaft. In some cases a crank may be used to drive the worm, as at 18 in Fig. 3.

8 is a cover to hopper 7. To prevent gases escaping from the hopper, its side may be perforated, as at 14, Fig. 3, to provide an exit into the fire. In some cases, as in Fig. 3, the grate may be in the form of an inverted cone and itself constitute the spout, and a vibratable ring 4. be used to shake out the ashes.

15 is a breaker for breaking up the fuel in case it cakes in the spout. The breaker may be driven by shafts 16 17 and gears 18.

An advantage of my invention is that it permits of the utilization of coal dust or slack either with or Without a blast, and inasmuch as such material will be more or less caked on entering the fire-pot the air-spaces in the grate may be larger than is otherwise customary.

It is of course understood that many variations may be made in the mechanical structure for carrying out my invention ,without departing from the spirit of the invention, the essential feature being that the fresh fuel be supplied to the fire from theunderside-that is to say, from the side nearest the grate, or opposite to that on which combustion is in progress-so that the burning fuel is pushed up or from the grate by the entering fresh fuel, and any smoke or gases evolved from the latter must pass through the fire on their way to the stack, and this whether the grate be horizontal, as shown, or inclined or otherwise.

What I claim is- 1. The combination, substantially as set forth, of the inverted-cone-shaped grate, the feed-channel opening into the grate at the bottom or apex of the cone, and the screw conveyer for feeding the fuel through the channel to the grate.

2. The combination, substantially as set forth, of the inverted-cone-shaped grate, the feed-channel opening into the bottom or apex thereof, the conveyer for feeding the fuel through said channel, the fuel-hopper, and the rotary breaker between the conveyer and the grate for breaking up caked fuel before it enters the grate.

3. The combination, substantially as set forth, of the fire-pot, the feed spout and channel, and the breaker for breaking up caked fuel before it enters the fire-pot and after it leaves the conveyer.

FREDERICK \V. WIESEBROCK. \Vitnesses: I

W. S. BATES, W. Rossrrnn. 

